Son, SJ Choi, HW Choi, DK Lee, SD Kim, HS Kim, SW 2024-01-21T04:41:56Z 2024-01-21T04:41:56Z 2021-09-03 2005-06-22 0888-5885 https://pubs.kist.re.kr/handle/201004/136350 Selective absorption of isoprene from n-pentane mixtures was performed via reversible g complexation with an aqueous solution of copper(1) nitrate, which was prepared by the disproportionation reaction between copper powder and cupric nitrate trihydrate [Cu(NO3)(2)(.) 3H2O] in H2O in the presence of pyridine and nitric acid as stabilizers. The absorption of isoprene by the Cu(I) solution increased with an increase in the molar ratio of isoprene/Cu(I) up to 1 and remained nearly constant thereafter. The maximum isoprene pickup achieved at the molar ratio of isoprene/Cu(I) = 1 was around 0.5 equiv of Cu(I), implying that isoprene was complexed with Cu(I) in a eta(2) mode. The absorption ability of the Cu(I) solution was strongly dependent on the concentrations of the stabilizers, which prevent the oxidation of Cu(I) to Cu(II). The optimal molar composition of the solution was found to be Cu(I)/pyridine/HNO3 = 1/2.7/1. English AMER CHEMICAL SOC OLEFIN/PARAFFIN SEPARATIONS ADSORPTION MEMBRANES TRANSPORT SORBENTS CARRIER Selective absorption of isoprene from C-5 mixtures by pi complexation with Cu(I) Article 10.1021/ie049358k 1 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.44, no.13, pp.4717 - 4720 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 44 13 4717 4720 scie scopus 000229870000024 2-s2.0-22444435799 Engineering, Chemical Engineering Article OLEFIN/PARAFFIN SEPARATIONS ADSORPTION MEMBRANES TRANSPORT SORBENTS CARRIER pi-complexation isoprene separation cupper(I) desorption